1 /***********************************************************************
2 * *
3 * This software is part of the ast package *
4 * Copyright (c) 1985-2013 AT&T Intellectual Property *
5 * and is licensed under the *
6 * Eclipse Public License, Version 1.0 *
7 * by AT&T Intellectual Property *
8 * *
9 * A copy of the License is available at *
10 * http://www.eclipse.org/org/documents/epl-v10.html *
11 * (with md5 checksum b35adb5213ca9657e911e9befb180842) *
12 * *
13 * Information and Software Systems Research *
14 * AT&T Research *
15 * Florham Park NJ *
16 * *
17 * Glenn Fowler <glenn.s.fowler@gmail.com> *
18 * David Korn <dgkorn@gmail.com> *
19 * Phong Vo <phongvo@gmail.com> *
20 * *
21 ***********************************************************************/
22 #pragma prototyped
23 /*
24 * Glenn Fowler
25 * AT&T Research
26 *
27 * generate POSIX fcntl.h
28 */
29
30 #include "FEATURE/standards" /* iffe --include-first */
31 #include "FEATURE/lib"
32
33 #include <sys/types.h>
34
35 #define getdtablesize ______getdtablesize
36 #define getpagesize ______getpagesize
37 #define ioctl ______ioctl
38
39 #if _typ_off64_t
40 #undef off_t
41 #ifdef __STDC__
42 #define off_t off_t
43 #endif
44 #endif
45
46 #if _hdr_fcntl
47 #include <fcntl.h>
48 #endif
49 #if _hdr_unistd
50 #include <unistd.h>
51 #endif
52 #if _sys_socket
53 #include <sys/socket.h>
54 #endif
55
56 #include <sys/stat.h>
57
58 #include "FEATURE/fs"
59
60 #undef getdtablesize
61 #undef getpagesize
62 #undef ioctl
63
64 #include "FEATURE/tty"
65
66 #if _typ_off64_t
67 #undef off_t
68 #define off_t off64_t
69 #endif
70
71 /*
72 * some bit macros may in fact be bits
73 */
74
75 static unsigned int
hibit(unsigned int m)76 hibit(unsigned int m)
77 {
78 unsigned int b;
79
80 while (b = m & (m - 1))
81 m = b;
82 return m;
83 }
84
85 #define ORIGIN_EXTENSION "ast extension"
86 #define ORIGIN_FAILSAFE "just in case _*_SOURCE circumvented"
87 #define ORIGIN_IGNORE "not implemented"
88
89 int
main(int argc,char ** argv)90 main(int argc, char** argv)
91 {
92 unsigned int f_local = 0;
93 unsigned int f_local_use;
94 unsigned int f_lck = 0;
95 unsigned int o_local = 2;
96 unsigned int o_local_min;
97 unsigned int o_local_use;
98
99 printf("#pragma prototyped\n");
100 printf("\n");
101 printf("#if _typ_off64_t\n");
102 printf("#undef off_t\n");
103 printf("#ifdef __STDC__\n");
104 printf("#define off_t off_t\n");
105 printf("#endif\n");
106 printf("#endif\n");
107 printf("\n");
108 printf("#include <ast_fs.h>\n");
109 printf("\n");
110 printf("#if _typ_off64_t\n");
111 printf("#undef off_t\n");
112 printf("#ifdef __STDC__\n");
113 printf("#define off_t off_t\n");
114 printf("#endif\n");
115 printf("#endif\n");
116 printf("\n");
117 printf("#include <fcntl.h>\n");
118 #if _hdr_mman
119 printf("#include <mman.h>\n");
120 #else
121 #if _sys_mman
122 printf("#include <sys/mman.h>\n");
123 #endif
124 #endif
125 printf("\n");
126 #ifndef FD_CLOEXEC
127 printf("#define FD_CLOEXEC 1\n");
128 printf("\n");
129 #endif
130
131 #ifdef F_DUPFD
132 if (F_DUPFD > f_local) f_local = F_DUPFD;
133 #endif
134 #ifdef F_DUPFD_CLOEXEC
135 if (F_DUPFD_CLOEXEC > f_local) f_local = F_DUPFD_CLOEXEC;
136 #else
137 #define NEED_F 1
138 #endif
139 #ifdef F_GETFD
140 if (F_GETFD > f_local) f_local = F_GETFD;
141 #endif
142 #ifdef F_GETFL
143 if (F_GETFL > f_local) f_local = F_GETFL;
144 #endif
145 #ifdef F_GETLK
146 if (F_GETLK > f_local) f_local = F_GETLK;
147 #endif
148 #ifdef F_RDLCK
149 if (F_RDLCK > f_lck) f_lck = F_RDLCK;
150 #endif
151 #ifdef F_SETFD
152 if (F_SETFD > f_local) f_local = F_SETFD;
153 #endif
154 #ifdef F_SETFL
155 if (F_SETFL > f_local) f_local = F_SETFL;
156 #endif
157 #ifdef F_SETLK
158 if (F_SETLK > f_local) f_local = F_SETLK;
159 #endif
160 #ifdef F_SETLKW
161 if (F_SETLKW > f_local) f_local = F_SETLKW;
162 #endif
163 #ifdef F_UNLCK
164 if (F_UNLCK > f_lck) f_lck = F_UNLCK;
165 #endif
166 #ifdef F_WRLCK
167 if (F_WRLCK > f_lck) f_lck = F_WRLCK;
168 #endif
169 #ifdef F_EXLCK
170 if (F_EXLCK > f_local) f_local = F_EXLCK;
171 #endif
172 #ifdef F_GETLEASE
173 if (F_GETLEASE > f_local) f_local = F_GETLEASE;
174 #endif
175 #ifdef F_GETLK64
176 if (F_GETLK64 > f_local) f_local = F_GETLK64;
177 #endif
178 #ifdef F_GETOWN
179 if (F_GETOWN > f_local) f_local = F_GETOWN;
180 #endif
181 #ifdef F_GETOWN_EX
182 if (F_GETOWN_EX > f_local) f_local = F_GETOWN_EX;
183 #endif
184 #ifdef F_GETSIG
185 if (F_GETSIG > f_local) f_local = F_GETSIG;
186 #endif
187 #ifdef F_NOTIFY
188 if (F_NOTIFY > f_local) f_local = F_NOTIFY;
189 #endif
190 #ifdef F_SETLEASE
191 if (F_SETLEASE > f_local) f_local = F_SETLEASE;
192 #endif
193 #ifdef F_SETLK64
194 if (F_SETLK64 > f_local) f_local = F_SETLK64;
195 #endif
196 #ifdef F_SETLKW64
197 if (F_SETLKW64 > f_local) f_local = F_SETLKW64;
198 #endif
199 #ifdef F_SETOWN
200 if (F_SETOWN > f_local) f_local = F_SETOWN;
201 #endif
202 #ifdef F_SETOWN_EX
203 if (F_SETOWN_EX > f_local) f_local = F_SETOWN_EX;
204 #endif
205 #ifdef F_SETSIG
206 if (F_SETSIG > f_local) f_local = F_SETSIG;
207 #endif
208 #ifdef F_SHLCK
209 if (F_SHLCK > f_local) f_local = F_SHLCK;
210 #endif
211 #ifdef F_SHARE
212 if (F_SHARE > f_local) f_local = F_SHARE;
213 #endif
214 #ifdef F_UNSHARE
215 if (F_UNSHARE > f_local) f_local = F_UNSHARE;
216 #endif
217 #ifdef F_BADFD /* Create Poison FD */
218 if (F_BADFD > f_local) f_local = F_BADFD;
219 #endif
220
221 #if NEED_F
222 #if _lib_fcntl
223 printf("#define _lib_fcntl 1\n");
224 #endif
225
226 /*
227 * pick a range for ast F_* local extensions that has a chance
228 * of remaining constant over time
229 */
230
231 if (f_local < 30000)
232 f_local = 30000;
233 else if (f_local < 1000000)
234 f_local = 1000000;
235 else
236 f_local++;
237 #ifndef F_DUPFD_CLOEXEC
238 f_local_use = f_local + 0;
239 printf("#define F_DUPFD_CLOEXEC (%d) /* %s */\n", f_local, ORIGIN_EXTENSION);
240 #endif
241 printf("#define _ast_F_LOCAL %d /* %s up to %d */\n", f_local, ORIGIN_EXTENSION, f_local_use);
242 #endif
243 #ifdef F_DUPFD_CLOEXEC
244 printf("#ifndef F_DUPFD_CLOEXEC\n");
245 printf("#define F_DUPFD_CLOEXEC (%d) /* %s */\n", (int)F_DUPFD_CLOEXEC, ORIGIN_FAILSAFE);
246 printf("#endif\n");
247 #endif
248 printf("\n");
249
250 #ifdef O_APPEND
251 if (O_APPEND > o_local) o_local = O_APPEND;
252 #endif
253 #ifdef O_CREAT
254 if (O_CREAT > o_local) o_local = O_CREAT;
255 #endif
256 #ifdef O_EXCL
257 if (O_EXCL > o_local) o_local = O_EXCL;
258 #endif
259 #ifdef O_NOCTTY
260 if (O_NOCTTY > o_local) o_local = O_NOCTTY;
261 #endif
262 #ifdef O_NONBLOCK
263 if (O_NONBLOCK > o_local) o_local = O_NONBLOCK;
264 #endif
265 #ifdef O_TRUNC
266 if (O_TRUNC > o_local) o_local = O_TRUNC;
267 #endif
268 #ifdef O_BLKSEEK
269 if (O_BLKSEEK > o_local) o_local = O_BLKSEEK;
270 #endif
271 #ifdef O_LARGEFILE
272 if (O_LARGEFILE > o_local) o_local = O_LARGEFILE;
273 #endif
274 #ifdef O_LARGEFILE128
275 if (O_LARGEFILE128 > o_local) o_local = O_LARGEFILE128;
276 #endif
277 #ifdef O_NOATIME
278 if (O_NOATIME > o_local) o_local = O_NOATIME;
279 #endif
280 #ifdef O_NOFOLLOW
281 if (O_NOFOLLOW > o_local) o_local = O_NOFOLLOW;
282 #endif
283 #ifdef O_NOLINKS
284 if (O_NOLINKS > o_local) o_local = O_NOLINKS;
285 #endif
286 #ifdef O_PRIV
287 if (O_PRIV > o_local) o_local = O_PRIV;
288 #endif
289 #ifdef O_DSYNC
290 if (O_DSYNC > o_local) o_local = O_DSYNC;
291 #endif
292 #ifdef O_RSYNC
293 if (O_RSYNC > o_local) o_local = O_RSYNC;
294 #endif
295 #ifdef O_SYNC
296 if (O_SYNC > o_local) o_local = O_SYNC;
297 #endif
298 #ifdef O_TEMPORARY
299 if (O_TEMPORARY > o_local) o_local = O_TEMPORARY;
300 #endif
301 #ifdef O_TMPFILE
302 if (O_TMPFILE > o_local) o_local = O_TMPFILE;
303 #endif
304 #ifdef O_XATTR
305 if (O_XATTR > o_local) o_local = O_XATTR;
306 #endif
307 #ifdef O_DIRECT
308 if (O_DIRECT > o_local) o_local = O_DIRECT;
309 #endif
310 #ifndef O_DIRECTORY
311 #ifdef O_OPENDIR
312 #define O_DIRECTORY O_OPENDIR
313 #define O_DIRECTORY_origin "O_OPENDIR"
314 #endif
315 #else
316 if (O_DIRECTORY > o_local) o_local = O_DIRECTORY;
317 #endif
318 #ifdef O_OPENDIR
319 if (O_OPENDIR > o_local) o_local = O_OPENDIR;
320 #endif
321 #ifndef O_SEARCH
322 #ifdef O_PATH
323 #define O_SEARCH O_PATH
324 #define O_SEARCH_origin "O_PATH"
325 #endif
326 #else
327 if (O_SEARCH > o_local) o_local = O_SEARCH;
328 #endif
329 #ifdef O_PATH
330 if (O_PATH > o_local) o_local = O_PATH;
331 #endif
332 #ifdef O_EXEC
333 if (O_EXEC > o_local) o_local = O_EXEC;
334 #endif
335 #ifdef O_CLOEXEC
336 if (O_CLOEXEC > o_local) o_local = O_CLOEXEC;
337 #endif
338 #ifdef O_NDELAY
339 if (O_NDELAY > o_local) o_local = O_NDELAY;
340 #endif
341 #ifdef O_TTY_INIT
342 if (O_TTY_INIT > o_local) o_local = O_TTY_INIT;
343 #endif
344
345 /*
346 * O_DIRECTORY and O_SEARCH are problematic and get special treatment.
347 * For some reason some systems make it hard to coax these values
348 * from the standard headers. This rigmarole makes sure they appear
349 * in the ast headers if they are implemented by the kernel, even absent
350 * native definitions. If you touch this code make sure you get it right.
351 *
352 * O_*_native are native implementation specific values
353 * that this file compilation may have failed to coax
354 * out of the native compilation system which ast
355 * nontheless would still like to use
356 *
357 * based on the assumption that the native system
358 * honors binary compatibility, subsequent code uses
359 * these values to probe the actual system call
360 * to determine if the feature is implemented anyway
361 */
362
363 #if __linux__
364 #define O_DIRECTORY_native 00200000
365 #define O_SEARCH_native 010000000,020000000,0100000000
366 /* #elif __some_other_os_that_wont_implement_posix_by_default__ */
367 #endif
368
369 {
370 unsigned int o_directory = 0;
371 unsigned int o_search = 0;
372 char* o_directory_origin = ORIGIN_EXTENSION;
373 char* o_search_origin = ORIGIN_IGNORE;
374 #ifdef O_SEARCH
375 o_search = O_SEARCH;
376 #ifndef O_SEARCH_origin
377 #define O_SEARCH_origin ORIGIN_FAILSAFE
378 #endif
379 o_search_origin = O_SEARCH_origin;
380 #elif defined(O_SEARCH_native)
381 {
382 int i;
383 char tmp[256];
384 unsigned int o_search_native[] = { O_SEARCH_native };
385 snprintf(tmp, sizeof(tmp), "%s.s", argv[1]);
386 if (!mkdir(tmp, S_IXUSR|S_IXGRP|S_IXOTH))
387 for (i = 0; i < (int)(sizeof(o_search_native)/sizeof(o_search_native[0])); i++)
388 if (!close(open(tmp, o_search_native[i])))
389 {
390 o_search_origin = "kernel bits otherwise undefined";
391 o_search = o_search_native[i];
392 if (o_search > o_local)
393 o_local = o_search;
394 break;
395 }
396 }
397 #endif
398 #ifdef O_DIRECTORY
399 o_directory = O_DIRECTORY;
400 #ifndef O_DIRECTORY_origin
401 #define O_DIRECTORY_origin ORIGIN_FAILSAFE
402 #endif
403 o_directory_origin = O_DIRECTORY_origin;
404 #elif defined(O_DIRECTORY_native)
405 {
406 int i;
407 char tmp[256];
408 unsigned int o_directory_native[] = { O_DIRECTORY_native };
409 snprintf(tmp, sizeof(tmp), "%s.d", argv[1]);
410 if (!mkdir(tmp, S_IXUSR|S_IXGRP|S_IXOTH))
411 for (i = 0; i < (int)(sizeof(o_directory_native)/sizeof(o_directory_native[0])); i++)
412 if (!close(open(tmp, O_DIRECTORY_native)))
413 {
414 snprintf(tmp, sizeof(tmp), "%s.f", argv[1]);
415 if (!close(open(tmp, O_CREAT|O_RDWR, S_IRUSR|S_IWUSR)) && close(open(tmp, o_directory_native[i]|O_RDONLY))))
416 {
417 o_directory_origin = "kernel bits otherwise undefined";
418 o_directory = o_directory_native[i];
419 if (o_directory > o_local)
420 o_local = o_directory;
421 }
422 }
423 }
424 #endif
425 o_local_min = hibit(o_local);
426 o_local_use = o_local = 020000000000;
427
428 printf("#define O_INTERCEPT %012o /* %s */\n", o_local, ORIGIN_EXTENSION);
429 printf("#ifndef O_SEARCH\n");
430 if (o_search)
431 printf("#define O_SEARCH %012o /* %s */\n", o_search, o_search_origin);
432 else
433 printf("#define O_SEARCH 0 /* %s */\n", o_search_origin);
434 printf("#endif\n");
435 if (!o_directory)
436 o_local_use = o_directory = o_local >> 1;
437 printf("#ifndef O_DIRECTORY\n");
438 printf("#define O_DIRECTORY %012o /* %s */\n", o_directory, o_directory_origin);
439 printf("#endif\n");
440
441 }
442
443 printf("#ifndef O_CLOEXEC\n");
444 #ifdef O_CLOEXEC
445 printf("#define O_CLOEXEC %012o /* %s */\n", (int)O_CLOEXEC, ORIGIN_FAILSAFE);
446 #else
447 o_local_use = o_local >> 2;
448 printf("#define O_CLOEXEC %012o /* %s */\n", o_local_use, ORIGIN_EXTENSION);
449 #endif
450 printf("#endif\n");
451
452 #ifndef O_NOCTTY
453 #ifdef TIOCNOTTY
454 printf("#ifndef O_NOCTTY\n");
455 o_local_use = o_local >> 3;
456 printf("#define O_NOCTTY %012o /* %s */\n", o_local_use, ORIGIN_EXTENSION);
457 printf("#endif\n");
458 #endif
459 #endif
460 #ifndef O_NONBLOCK
461 printf("#ifndef O_NONBLOCK\n");
462 printf("#ifdef O_NDELAY\n");
463 #ifdef O_NDELAY
464 printf("#define O_NONBLOCK %012o /* O_NDELAY */\n", (int)O_NDELAY);
465 #else
466 printf("#define O_NONBLOCK O_NDELAY\n");
467 #endif
468 printf("#else\n");
469 printf("#ifdef FNDELAY\n");
470 #ifdef FNDELAY
471 printf("#define O_NONBLOCK %012o /* FNDELAY */\n", FNDELAY);
472 #else
473 printf("#define O_NONBLOCK FNDELAY\n");
474 #endif
475 printf("#else\n");
476 o_local_use = o_local >> 4;
477 printf("#define O_NONBLOCK %012o /* %s */\n", o_local_use, ORIGIN_EXTENSION);
478 printf("#endif\n");
479 printf("#endif\n");
480 printf("#endif\n");
481 #endif
482
483 printf("\n");
484 printf("#define _ast_O_LOCAL %012o /* %s up to %012o%s */\n", o_local_use, ORIGIN_EXTENSION, o_local, o_local_use <= o_local_min ? " *** encroaches on native O_* flags ***" : "");
485 printf("\n");
486
487 #ifndef O_NDELAY
488 printf("#ifndef O_NDELAY\n");
489 printf("#define O_NDELAY O_NONBLOCK\n");
490 printf("#endif\n");
491 #endif
492 #ifndef O_ACCMODE
493 printf("#define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR)\n");
494 #endif
495 #ifndef O_BINARY
496 printf("#define O_BINARY 0 /* %s */\n", ORIGIN_IGNORE);
497 #endif
498 #ifdef O_DIRECT
499 printf("#ifndef O_DIRECT\n");
500 printf("#define O_DIRECT %012o /* %s */\n", (int)O_DIRECT, ORIGIN_FAILSAFE);
501 printf("#endif\n");
502 #endif
503 #ifdef O_NOFOLLOW
504 printf("#ifndef O_NOFOLLOW\n");
505 printf("#define O_NOFOLLOW %012o /* %s */\n", (int)O_NOFOLLOW, ORIGIN_FAILSAFE);
506 printf("#endif\n");
507 #endif
508 #ifdef O_NOATIME
509 printf("#ifndef O_NOATIME\n");
510 printf("#define O_NOATIME %012o /* %s */\n", (int)O_NOATIME, ORIGIN_FAILSAFE);
511 printf("#endif\n");
512 #endif
513 #ifndef O_TEMPORARY
514 printf("#define O_TEMPORARY 0 /* %s */\n", ORIGIN_IGNORE);
515 #endif
516 #ifndef O_TEXT
517 printf("#define O_TEXT 0 /* %s */\n", ORIGIN_IGNORE);
518 #endif
519 #if !defined(SOCK_CLOEXEC) || !defined(SOCK_NONBLOCK)
520 printf("\n");
521 #ifndef SOCK_CLOEXEC
522 printf("#ifndef SOCK_CLOEXEC\n");
523 printf("#define _ast_SOCK_CLOEXEC 1\n");
524 printf("#define SOCK_CLOEXEC 02000000 /* %s */\n", ORIGIN_EXTENSION);
525 printf("#endif\n");
526 #endif
527 #ifndef SOCK_NONBLOCK
528 printf("#ifndef SOCK_NONBLOCK\n");
529 printf("#define _ast_SOCK_NONBLOCK 1\n");
530 printf("#define SOCK_NONBLOCK 04000 /* %s */\n", ORIGIN_EXTENSION);
531 printf("#endif\n");
532 #endif
533 #endif
534
535 printf("\n");
536 printf("#define F_dupfd_cloexec F_DUPFD_CLOEXEC /* OBSOLETE */\n");
537 printf("#define O_cloexec O_CLOEXEC /* OBSOLETE*/\n");
538 #if !defined(AT_FDCWD) || !defined(AT_SYMLINK_NOFOLLOW) || !defined(AT_REMOVEDIR) || !defined(AT_SYMLINK_FOLLOW) || !defined(AT_EACCESS)
539 printf("\n");
540 #ifndef AT_FDCWD
541 /* AT_FDCWD must be < -256 for portability reasons */
542 printf("#define AT_FDCWD -666 /* %s */\n", ORIGIN_EXTENSION);
543 #endif
544 #ifndef AT_SYMLINK_NOFOLLOW
545 printf("#define AT_SYMLINK_NOFOLLOW 0x100 /* %s */\n", ORIGIN_EXTENSION);
546 #endif
547 #ifndef AT_REMOVEDIR
548 printf("#define AT_REMOVEDIR 0x200 /* %s*/\n", ORIGIN_EXTENSION);
549 #endif
550 #ifndef AT_SYMLINK_FOLLOW
551 printf("#define AT_SYMLINK_FOLLOW 0x400 /* %s*/\n", ORIGIN_EXTENSION);
552 #endif
553 #ifndef AT_EACCESS
554 printf("#define AT_EACCESS 0x800 /* %s*/\n", ORIGIN_EXTENSION);
555 #endif
556 #endif
557 printf("\n");
558 printf("#include <ast_fs.h>\n");
559 printf("#if _typ_off64_t\n");
560 printf("#undef off_t\n");
561 printf("#define off_t off64_t\n");
562 printf("#endif\n");
563 printf("#if _lib_fstat64\n");
564 printf("#define fstat fstat64\n");
565 printf("#endif\n");
566 printf("#if _lib_fstatat64\n");
567 printf("#define fstatat fstatat64\n");
568 printf("#endif\n");
569 printf("#if _lib_lstat64\n");
570 printf("#define lstat lstat64\n");
571 printf("#endif\n");
572 printf("#if _lib_stat64\n");
573 printf("#define stat stat64\n");
574 printf("#endif\n");
575 printf("#if _lib_creat64\n");
576 printf("#define creat creat64\n");
577 printf("#endif\n");
578 printf("#if _lib_mmap64\n");
579 printf("#define mmap mmap64\n");
580 printf("#endif\n");
581 printf("#if _lib_open64\n");
582 printf("#undef open\n");
583 printf("#define open open64\n");
584 printf("#endif\n");
585
586 printf("\n");
587 printf("#if _BLD_ast && defined(__EXPORT__)\n");
588 printf("#define extern __EXPORT__\n");
589 printf("#endif\n");
590 printf("#if !_lib_faccessat\n");
591 printf("extern int faccessat(int, const char*, mode_t, int);\n");
592 printf("#endif\n");
593 printf("#if !_lib_fchmodat\n");
594 printf("extern int fchmodat(int, const char*, mode_t, int);\n");
595 printf("#endif\n");
596 printf("#if !_lib_fchownat\n");
597 printf("extern int fchownat(int, const char*, uid_t, gid_t, int);\n");
598 printf("#endif\n");
599 printf("#if !_lib_fstatat\n");
600 printf("struct stat;\n");
601 printf("extern int fstatat(int, const char*, struct stat*, int);\n");
602 printf("#endif\n");
603 printf("#if !_lib_linkat\n");
604 printf("extern int linkat(int, const char*, int, const char*, int);\n");
605 printf("#endif\n");
606 printf("#if !_lib_mkdirat\n");
607 printf("extern int mkdirat(int, const char*, mode_t);\n");
608 printf("#endif\n");
609 printf("#if !_lib_mkfifoat\n");
610 printf("extern int mkfifoat(int, const char*, mode_t);\n");
611 printf("#endif\n");
612 printf("#if !_lib_mknodat\n");
613 printf("extern int mknodat(int, const char*, mode_t, dev_t);\n");
614 printf("#endif\n");
615 printf("#if !_lib_openat\n");
616 printf("extern int openat(int, const char*, int, ...);\n");
617 printf("#endif\n");
618 printf("#if !_lib_readlinkat\n");
619 printf("extern ssize_t readlinkat(int, const char*, char*, size_t);\n");
620 printf("#endif\n");
621 printf("#if !_lib_renameat\n");
622 printf("extern int renameat(int, const char*, int, const char*);\n");
623 printf("#endif\n");
624 printf("#if !_lib_symlinkat\n");
625 printf("extern int symlinkat(const char*, int, const char*);\n");
626 printf("#endif\n");
627 printf("#if !_lib_unlinkat\n");
628 printf("extern int unlinkat(int, const char*, int);\n");
629 printf("#endif\n");
630 printf("\n");
631 printf("#undef extern\n");
632
633 return 0;
634 }
635